Method of and machine for casting



Dec. 25, 1928. 1,696,670

E. J. BYERLEIN METHOD .oF AND MACHINE FOR CASTING Filed Oct. '20, 1927 Sheets-Sheet 1 771014@ *Mew/l A TToRNEYs Dec. 25, 1928. 1,696,670

E. J. BYr-:RLEIN METHOD OF AND MACHINE FQR CASTING.

Filed oct. 2o. 1927 2 sheets-sneer 2' A TTORNEYS Patented Dec. 25, 1928.

UNITEDl STATES ERLE J. BYERLEIN, OF WAUWATOSA, WISCONSN.

METHOD 0F AND MACHINE FOR -CASTNG. i

Application filed October20, 1927. Serial No. 227,526.

y lThis invention relates tol improvements in method of and machine for casting.

It is one of the objects of the present invent-ion to provide. a method of and machine for casting in which sand or refractory material molds may be used a great number of times in casting similar articles, and thus eliminate considerable expense over the ordinary operation in providing a new sand or refractory material mold for each casting made.

A further object of the invention is to pro.- vide a method of and machine for cast-ing in which the sections of the mold are movable away from each other to strip the casting while the casting is momentarily suspended before being discharged.

A further object of the invention is to provide a. method of and machiney for casting in which the stripping and discharge of the casting is automatic with the separation of' the mold sections,

n. further object of the invention is to provide a method of and a machine for casting which is of simple construction, is strong and durable and is well adapted for the purpose described.

.lilith the above and other objects in view, the invention consists of the improved method of and machine for casting, and its parts and combinations as set forth in the claims, and all equivalents thereof.

In the accompanying drawings, in which the same reference characters indicate the same parts in all of the views:

Fig. 1 is a top view of the improved casting machine shown in closed or casting position;

Fig. 2 is a side view thereof;

Fig. 3 is a central vertical transverse sectional view taken online 3--3 of Fig. 1;

Fig. 4 is a central longitudinal sectional view taken on line 4 4 of F ig. 1, showing the mold sections in closed positions;

Fig. 5 is a fragmentary sectional view with the mold section in open position and the casting maintained in a central position therebetween Fig. 6 is a sectional detail view olf a modified form of stripping pin; and

Fig. 7 is av side view of the operating lever and connected links shown in open position.

Referring to the drawings, the numeral 8 indicates a base member which is provided connected by bolts 15. The front sidesof the flask members are open. Flasks of any .size desired may be bolted to the frame. The

opposite sides of eachflask are formed with l outwardly extending lugs 16, of which the lugs on one flask member are provided with tapered dowel guide pins 17 and the lugs on the other flask member are formed with holes4 18 to receive the pins and aline the two mem-- bers when the flask members are adjacent each other, as shown in Figs. 1 to 4inclusive. ri`he base member 8 is also provided with upwardly extending standards 19 to which are pivotally connected by screws 19 the end portions of a U-shaped lever 20. Said end portion-s have opposite extensions 21 forming double bell crank levers to which the. inner ends of links 22 are pivotally connected by screws 22. The links are of curvedvformation, as clearly shown in Fig. 2, and extend in pairs above andV below each other, and the outer ends of each pair of links are pivotally connected to the end portions of the slidable flask holding members 11 by screws 23. Vhen the flask members are in closed position, as shown in Figs. 1, 2 and 4, the U- shaped lever 20 is in its lowermost position, and the pivot screws of the U-shapedlever and the links are ink alined horizontal position, and which position locks the flask members against movement away from eac-h other. When the flasks are in open position the lever 2() and the connected links 22 are lin the position shown in Fig. 7. l

Supplemental frame members 24, having eyed end portions 24', are slidably mounted on the guide bars 10 and are yieldingly held in their forward position against collars 25V by coiled springs 26. The springs surround the guide bars and are interposed between the eyed end portions ofthe frame members 9 and the supplemental frame members 24. The

collars 25 are adjustably mounted on t-he guide bars 10 and are held in adjusted position by set bolts 27. Bolts 2S rigidly connected to the medial portions of the supplemental frames 24 extend outwardly therefrom and loosely through openings 29 in the frames 9, and at their outer ends are provided with nuts 30 to also adjustably control the inward movement of the supplemental frames and permit a close adjustment of the collars. In adjusting, the nuts 30 are turned to properly position the supplement al frames and the collars are then adjusted to the position of the supplemental frames.

The flask members are provided with inwardly extending tubular members 3l to receive stripping and holding pins 32 which at their outer ends are rigidly connected to the supplemental frames 24 and move therewith. The forward portions of the pins entend slidably through the tubular sleeves, and at their inne-r ends are formed with conical points 32 around which the molten metal is poured in forming castings in the mold flask members. The stripping pins 32 of the opposite supplemental frames are in alineinent with each other, and their inner' conical ends, when in their innermost position, are spaced apart a distance approximately the thickness of the casting at the points of engagement therewith.

In moldin g, the flask members are filled with sand or other refractory material 33,

and the pattern is placed therein in the ordinary manner to form the mold in each Hash member, and when formed, the said members are mounted on the holding members with the pins extending through the tubular members of the flasks and the conical sprue or filling opening or duct 3a extending upwardly. rlhis opening communicates with the mold recesses 35 by branch ducts 36, and each mold recess is provided with an air opening or duct 37 to permit the free escape of the air and hot gases from the mold recesses in casting. The operating lever 2O is then swung downwardly to slide Jthe flask sections together, and when in this position, the conical ends of the stripping pins will `inst project into the mold recesses, as shown in Fig. Al. In casting wheels, as shown, the stripping pins would enter the axial portions of the mold spaces or any other spaces desired. The molten metal is then poured in the sprue opening to fill the mold recesses, and when the metal has set, the U- shaped lever member is swung upwardly to separate the flask members. The lever meinber will slide the flask members away from each other until the flash frames contact with the supplemental frames, as indicated in Fig. 5, and in this position the casting or castings will be stripped from the sand and held be.- tween the flask members by the stripping pins. A further movement of the lever member will cause the flask frames to move the opposite supplemental frames and the stripping pins away from each other and permit the completed casting or castings to drop. The lever member is then swung to its lower position to slide the molding liask members to closed position, and in moving, the springs will move the opposite supplemental frames and stripping pins towards each other to casting engaging position.

Attention is also directed to the fact that when the mold sections are in closed position, the alined position of the pivot screws of tl e operating lever forms a lock to prevent accidental separation of the flask members. Furthermore, at the start of separation and at the end point of closing of the Hash members the movement is very slow, due to the relative position of the arms of the bell crank lever and the links, so that the refractor ,material or sand formino the mold is not disturbed.

ln the modified form shown in Fig. 6, the end of the stripping rod 32 is provided with a conical or other shaped recess 38 in lieu of conical or other shaped points shown in the first form.

As the flask members are moved towards and away from each other in a straight line without arring, and the stripping pins hold the casting or castings immovable in mid-position therebetween, there is no tendency to disturb the refractory material or sand of the flasks formino' the mold, with the result that the same mold sections may be used for forming castings a great number of times.

Furthermore, if desired, the mold sections may be. formed of refractory material of suflicient hardness to be bolted directly to the frame members l1 and thus dispense with the use of thel liaslr members.

From the foregoing description, it will be seen that the method of and machine for molding is very simple and easily carried out, and permits the use of molds a great number of times.

What I claim as my invention is:

l. A casting machine, comprising a. support having a guide means, flask sections slidably mounted thereon and movable towards and away from each other, stripping pins eX- tending through the flask sections and into the recesses forming the mold for engaging the casting to be formed therein, means for moving the flask sections to open positions while the stripping pins are in their casting engaging position, and meansI for moving the stripping pins to cast-ing disengaging position while the liask sections are in open position. p

2. A casting machine, comprising a support having spaced guide bars, flash holding frames slidably mounted on the guide bars and movable towards and away from each other, flask sections mounted on the holding frames and movable therewith, a supplemental frame slidably mounted on the guide bars and provided with stripping pins which extend through the flash sections and into the recesses forming the mold 'for en aging the opposite sides of the casting to e formed par lofi

therein, a lever member for moving the flask sections towards open position a predetermined distanceand then moving the stripping pins to casting disengaging position while further moving the flaskfsections to full open position, and other means for moving the supplementalframes and the stripping pins to casting engaging position. l

3. A casting machinecomprising a support having spaced guide bars, flask holding frames slidably mounted on Ythe guide bars and movable towards vand away from each other, flask sections mounted on the holding frames and movable therewith, a supplemental frame slidably mounted on the guide bars and rprovided with stripping pins which extend through the flask sections and into the recessesv forming t-he mold for engaging the opposite sides ofthe casting to be formed therein, a lever member for moving the flask sections towards openposition a predetermined distance and then moving the stripping pins to casting disengaging position while further moving the flask sections to full open position, and spring means for yieldingly moving the supplemental frames and the stripping pins connected thereto towards each other to casting engaging position. n

4. A casting machine, lcomprising a'support having spaced arallel guide bars, flask holding fra-mes slida ly mounted on the guide bars, flask sections carried vby thecholding frames, a lever member for moving the holding frames towards and vaway from each other, supplemental frames mounted on the guide bars in the path of movement of the flask holding frames and moved thereby at the outer end portions of the movements of said holding frames, stripping pins carried by the supplemental frames and extending into the flask sections to casting holding position, stop means for limiting the inward movement of the supplemental frames, and a yielding means holding the supplemental frames against the stop means.

5. A casting machine, comprising a support having spaced parallel guide bars, flask holding frames slidably mounted on the guide bars, flask sections carried by the holding frames, tubular guide members forming part of the flask sections and extending into the sections in the line of movement of the sections, a lever member for moving the holding frames towards and away from each other, supplemental frames mounted on the guide bars in the path of movement of the flask holding frames and moved thereby at the outer end portions of the movements of said holding frames, stripping pins carried by the supplemental frames and extending through the tubular members of the flask sections to casting holding position, stop collars adjustably mounted on the guide bars for limiting the inward movement of the supplemental frames, and coiled springs for yieldingly holding the supplemental frames against the stop collars. f

6. A casting machine, comprising a support having spaced parallel guide bars, flask holding frames slidably mounted on the guide bars, flask sections carried by the holding frames and having inwardly extending tubular guide members, a lever member having a linked connection with the holding frames for moving said frames towards and away from each other, supplemental frames slidably mounted on the guide bars and in the path of movement/of the outer portions of the holding frames and moved thereby at the outer en d portions of the movements of said holding frames, stripping pins carried by the supplemental frames and extending through the tubular guide -members of the flask sections to casting holding position, stop collars adjustably mounted on the guide bars for limiting the inward movement of the supplemental frames, and coiled springs surrounding the guide bars and interposed between the support and the supplemental frames for yieldingly holding the sup plemental frames against the stop collars.

7. A casting machine, comprising a support having spaced parallel guide bars, flask holding frames slidably mounted on the guide bars, flask sections carried by the holding frames and having inwardly extending tubular guide members, a lever member having a linked connectionl with. the holding frames for moving said frames towards away from each other, supplemental frames slidably mounted on the guide bars and in the path of movement of the outer portiensof the holding frames andvmoved thereby at the outer end portions of the movement-s of said holding frames, stripping pins carried by the supplemental frames and extending through the tubular guide members of the flask sections to casting holding position, the inner ends of 'said stripping pins being of conical form, stop collars adjustably mounted on the guide bars for limiting the inward movement of the supplemental frames, other means for adjustably limiting the inward movement of the supplemental frames, and coiled springs surrounding the guide bars and interposed between the support and the supplemental frames for yieldingly holding the supplemental frames against the Vstop collars.

8. A casting machine, comprising a support having spaced parallel guide bars, flask holding frames slidably mounted on the guide bars, flask sections carried by the holding frames and having inwardly extending tubular guide members,`a lever member having a linked connection with the holding frames for moving said frames towards and away from each other, said link connections locking the holding frames in closed position,

l l) t) supplemental frames slida-bily mounted on the guide bars and in the path of' movement of the outer' portions of the holding frames and moved thereby at the outer end portions of the movements of said holding frames, stripping pins carried by the supplemental frames and extending through the tubular guide members of the flask sections to casting holding position, stop collars adjustably mounted on the guide bars for limiting the inward movement of the supplemental frames, and coiled springs surrounding the guide bars and interposed between the support and the supplen'iental frames for yieldingly holding the supplemental 'fra-mes against the stop collars.

9. A casting machine7 comprising a support having spaced parallel guide bars, flask holding tra-mes slidably mounted on the guide bars, flask sections carried by the holding frames and having inwardly extending tubular guide members, a lever member having a linked connection with the holding frames for moving said frames towards and away from each other, said link connections having pivotal means which are in locking alinement with each other when the flask sections are in closed position, supplemental frames slidably mounted on the guide bars and in the path of movement of the outer portions of the holding frames and moved thereby at the outer end portions oit the movements of said holding frames, stripping pins carried by the supplemental frames and extending through the tubular guide members of the flask sections to casting holding position, stop collars adjustably mounted on the guide bars for limiting the inward movement of the supplemental frames, and coiled springs surrounding the guide bars and interposed between thesupport and the supplemental frames for yieldingly holding the supplemental frames against the stop collars.

10. A casting machine, comprising flask sections movable towards and away from each other, stripping members positioned to be enga-ged by the casting to be formed in the mold, means for moving the flask ,sections away from each other while the stripping members hold the casting, and means for moving. the stripping members away from the casting to discharge the casting from the mold.

ll. A casting machine, comprising flask sections movable towards and away from each other, stripping members positioned to have their inner end portions engaged by opposite side portions of the casting to be 'formed in the mold, means for moving the flask sections in a straight line away from each other while the stripping members hold the casting, and means for moving the stripping members in a straight line away from each other and in a line parallel to the movement of the flask members to discharge the casting from the mold.

l2. A casting machine, comprising mold sections, one of which is movable towards and away from the other, a stripping means positioned to be engaged by the casting to be formed in the mold7 means for moving one of the flask sections away from the other while the stripping members hold the casting, and means for moving one of the stripping members away from the casting to discharge the casting from the mold.

In testimony whereof, I affix my signature.

ERLE J. BYERLEIN. 

